CN105524547B - A kind of polyimides with excellent abrasion resistance/fluorinated graphene composite anti-wear coating and preparation method thereof - Google Patents
A kind of polyimides with excellent abrasion resistance/fluorinated graphene composite anti-wear coating and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0209—Multistage baking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
- C08G73/1071—Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
A kind of polyimides with excellent abrasion resistance/fluorinated graphene composite anti-wear coating of the present invention and preparation method thereof, including metallic substrates and coated on the composite anti-wear coating in metallic substrates, metallic substrates are the iron-based material by machining, and composite anti-wear coating constituent percentage composition by weight includes：Polyimides 99% ~ 99.9%；Kollag 0.1% ~ 1%；Kollag is fluorinated graphene piece；Preparation method comprises the following steps：（ⅰ）The preparation of complex abrasion-proof coating；（ⅱ）The coating of composite anti-wear coating；（ⅲ）The sintering of composite anti-wear coating.Composite anti-wear coating of the present invention is using polyimides as matrix, and after self-lubricating conjunction wear-resistant coating is made in addition fluorinated graphene, its wear resistance is much better than pure polyimide coating under three kinds of working conditions；The addition of used kollag fluorinated graphene piece is seldom, is effectively saved resource, avoids the generation of agglomeration；Preparation technology is simple, economical and practical, suitable for industrialization promotion.
Description
Technical field
The invention belongs to a kind of composite coating and preparation method thereof, and in particular to a kind of polyamides with excellent abrasion resistance
Imines/fluorinated graphene composite anti-wear coating and preparation method thereof.
Background technology
As a kind of Super Engineering material, polyimides with its excellent mechanical performance, high temperature resistant, it is resistant to chemical etching and
The performance such as wear-resistant and be widely used in the fields such as aircraft industry and microelectronics.In recent years, in order to further lift polyamides
To meet the requirements at the higher level in market, various kollags are added in polyimide matrix to obtain the abrasion resistance properties of imines
Obtain more excellent anti-wear and wear-resistant performance.As Japanese Dow Corning Asia Co., Ltd by polytetrafluoroethylene (PTFE), molybdenum disulfide, graphite and
The materials such as carborundum are added in Thermocurable polyimide matrix, and the paint composition for sliding part has been prepared.Zhejiang
Thermosetting polyimide wear-resistant self-lubricating swash plate has successfully been made also by using additive in Chang Sheng Sliding Bearing Co., Ltd.
Although existing art scheme effectively enhances the abrasion resistance properties of polyimides, however one can not be ignored ask
Topic is exactly that added solid lubricant filler amount is larger, and the addition of substantial amounts of solid lubricant filler is inevitably rolled into a ball
Poly-, so as to influence the mechanical property of matrix material, limit material uses field, while also result in substantial amounts of resource wave
Take.
New derivatives of the fluorinated graphene as graphene, the performance of graphene high intensity was both maintained, and because fluorine is former
The introducing of son brings the novel interface such as surface energy reduction, hydrophobicity enhancing and Bandgap extension and physical and chemical performance.Meanwhile
Fluorinated graphene high temperature resistant, chemical property are stable, show the property of similar polytetrafluoroethylene (PTFE), are referred to as " two-dimentional Teflon
Dragon ".It is wide that these unique performances of fluorinated graphene make it have in fields such as interface, novel nano electronic device, lubriation materials
General application prospect.
The content of the invention
The present invention proposes to overcome shortcoming present in prior art, a kind of with excellent the purpose is to provide
The polyimides of abrasion resistance/fluorinated graphene composite anti-wear coating and preparation method thereof.
The technical scheme is that：
A kind of polyimides with excellent abrasion resistance/fluorinated graphene composite anti-wear coating, including metallic substrates and
Coated on the composite anti-wear coating in metallic substrates, the metallic substrates are the iron-based material by machining, described compound
Wear-resistant coating constituent percentage composition by weight includes：
Polyimides 99%~99.9%；
Kollag 0.1%~1%；
The kollag is fluorinated graphene piece.
The thickness of the fluorinated graphene piece is nanoscale.
A kind of preparation method of the polyimides with excellent abrasion resistance/fluorinated graphene composite anti-wear coating, including
Following steps：
The preparation of (I) complex abrasion-proof coating
At low temperature, a certain amount of monomer 4,4 '-diaminodiphenyl ether are added in aprotic polar solvent, treat monomer 4,
After 4 '-diaminodiphenyl ether is completely dissolved, fluorinated graphene piece is added；Add and rubbed with monomer 4,4 '-diaminodiphenyl ether etc.
The monomer pyromellitic dianhydride of your amount, stirring, produces complex abrasion-proof coating；
The coating of (II) composite anti-wear coating
Complex abrasion-proof coating obtained by step (I) is pressed into 0.1~0.2mL/cm2Proportioning under room temperature environment in metallic substrates
On brushed, coating surface uniform bubble-free；
The sintering of (III) composite anti-wear coating
Composite anti-wear coating obtained by step (II) is put into vacuum drying chamber first, 6h is dried at 60 DEG C~80 DEG C；
Then place into baking oven, 2h is sintered at 80 DEG C；It is warming up to 135 DEG C and re-sinters 2h；300 DEG C of sintering 2h are warming up to again, are produced
Polyimides/fluorinated graphene composite anti-wear coating.
The low temperature is -10 DEG C~25 DEG C.
The aprotic polar solvent is DMA.
The quality that the step (I) adds fluorinated graphene piece is monomer 4,4 '-diaminodiphenyl ether and the equal benzene four of monomer
The 0.1%~1% of formic anhydride quality sum.
Step (I) aprotic polar solvent and monomer 4,4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride
Mol ratio be 32:1:1.
Step (I) mixing time is 4~10h
Be warming up to 135 DEG C by 80 DEG C when sintering in the step (III) and last 1h, by 135 DEG C be warming up to 300 DEG C last 1~
2h。
The beneficial effects of the invention are as follows：
For composite anti-wear coating of the present invention using polyimides as matrix, the painting of self-lubricating complex abrasion-proof is made in addition fluorinated graphene
After layer, its wear resistance is much better than pure polyimide coating under three kinds of working conditions；Institute is fluorinated using kollag
The addition of graphene film is seldom, is effectively saved resource, avoids the generation of agglomeration；Preparation technology is simple, economical and practical,
Suitable for industrialization promotion.
Brief description of the drawings
Fig. 1 is composite anti-wear coating photo of the present invention；
Wear surface photo under Fig. 2 composite anti-wear coating DRY SLIDINGs；
Wear surface photo of Fig. 3 composite anti-wear coatings under the conditions of water lubrication；
Wear surface photo of Fig. 4 composite anti-wear coatings under Oil Lubrication Condition.
Wherein：A is pure polyimide coating, and fluorinated graphene content is 0.25%, 0.5%, 0.75% and to b~e successively
1% polyimides composite coating.
Embodiment
Polyimides of the present invention/fluorinated graphene composite anti-wear coating and preparation method thereof is carried out with reference to embodiment
Describe in detail：
Embodiment 1
A kind of preparation method of the polyimides with excellent abrasion resistance/fluorinated graphene composite anti-wear coating, including
Following steps：
The preparation of (I) complex abrasion-proof coating
At 0~5 DEG C, by a certain amount of monomer 4,4 '-diaminodiphenyl ether is added in DMA, treats list
Body 4, after 4 '-diaminodiphenyl ether is completely dissolved, add fluorinated graphene piece；Add and monomer 4,4 '-diaminodiphenyl ether
The monomer pyromellitic dianhydride of equimolar amounts, stirring, complex abrasion-proof coating is produced, the quality for adding fluorinated graphene piece is monomer
4, the 0.25% of 4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride quality sum, DMA and monomer 4,
The mol ratio of 4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride is 32:1:1；
The coating of (II) composite anti-wear coating
Complex abrasion-proof coating obtained by step (I) is pressed into 0.15mL/cm2Proportioning enter on the metallic substrate under room temperature environment
Row is brushed, coating surface uniform bubble-free；
The sintering of (III) composite anti-wear coating
Composite anti-wear coating obtained by step (II) is put into vacuum drying chamber first, 6h is dried at 80 DEG C；Then again
It is put into baking oven, 2h is sintered at 80 DEG C；Last 1h and be warming up to 135 DEG C, 2h is re-sintered at 135 DEG C；1h is lasted again to be warming up to
300 DEG C, 2h is sintered at 300 DEG C, polyimides/fluorinated graphene composite anti-wear coating is produced, as shown in b in Fig. 1.
Embodiment 2
At 0~5 DEG C, by a certain amount of monomer 4,4 '-diaminodiphenyl ether is added in DMA, treats list
Body 4, after 4 '-diaminodiphenyl ether is completely dissolved, add fluorinated graphene piece；Add and monomer 4,4 '-diaminodiphenyl ether
The monomer pyromellitic dianhydride of equimolar amounts, stirring, complex abrasion-proof coating is produced, the quality for adding fluorinated graphene piece is monomer
4, the 0.5% of 4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride quality sum, DMA and monomer 4,
The mol ratio of 4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride is 32:1:1；
The coating of (II) composite anti-wear coating
Complex abrasion-proof coating obtained by step (I) is pressed into 0.15mL/cm2Proportioning enter on the metallic substrate under room temperature environment
Row is brushed, coating surface uniform bubble-free；
The sintering of (III) composite anti-wear coating
Composite anti-wear coating obtained by step (II) is put into vacuum drying chamber first, 6h is dried at 80 DEG C；Then again
It is put into baking oven, 2h is sintered at 80 DEG C；Last 1h and be warming up to 135 DEG C, 2h is re-sintered at 135 DEG C；1h is lasted again to be warming up to
300 DEG C, 2h is sintered at 300 DEG C, polyimides/fluorinated graphene composite anti-wear coating is produced, as shown in c in Fig. 1.
Embodiment 3
At 0~5 DEG C, by a certain amount of monomer 4,4 '-diaminodiphenyl ether is added in DMA, treats list
Body 4, after 4 '-diaminodiphenyl ether is completely dissolved, add fluorinated graphene piece；Add and monomer 4,4 '-diaminodiphenyl ether
The monomer pyromellitic dianhydride of equimolar amounts, stirring, complex abrasion-proof coating is produced, the quality for adding fluorinated graphene piece is monomer
4, the 0.75% of 4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride quality sum, DMA and monomer 4,
The mol ratio of 4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride is 32:1:1；
The coating of (II) composite anti-wear coating
Complex abrasion-proof coating obtained by step (I) is pressed into 0.15mL/cm2Proportioning enter on the metallic substrate under room temperature environment
Row is brushed, coating surface uniform bubble-free；
The sintering of (III) composite anti-wear coating
Composite anti-wear coating obtained by step (II) is put into vacuum drying chamber first, 6h is dried at 80 DEG C；Then again
It is put into baking oven, 2h is sintered at 80 DEG C；Last 1h and be warming up to 135 DEG C, 2h is re-sintered at 135 DEG C；1h is lasted again to be warming up to
300 DEG C, 2h is sintered at 300 DEG C, polyimides/fluorinated graphene composite anti-wear coating is produced, as shown in d in Fig. 1.
Embodiment 4
At 0~5 DEG C, by a certain amount of monomer 4,4 '-diaminodiphenyl ether is added in DMA, treats list
Body 4, after 4 '-diaminodiphenyl ether is completely dissolved, add fluorinated graphene piece；Add and monomer 4,4 '-diaminodiphenyl ether
The monomer pyromellitic dianhydride of equimolar amounts, stirring, complex abrasion-proof coating is produced, the quality for adding fluorinated graphene piece is monomer
4, the 1% of 4 '-diaminodiphenyl ether and monomer pyromellitic dianhydride quality sum, DMA and monomer 4,4 '-
The mol ratio of diaminodiphenyl ether and monomer pyromellitic dianhydride is 32:1:1；
The coating of (II) composite anti-wear coating
Complex abrasion-proof coating obtained by step (I) is pressed into 0.15mL/cm2Proportioning enter on the metallic substrate under room temperature environment
Row is brushed, coating surface uniform bubble-free；
The sintering of (III) composite anti-wear coating
Composite anti-wear coating obtained by step (II) is put into vacuum drying chamber first, 6h is dried at 80 DEG C；Then again
It is put into baking oven, 2h is sintered at 80 DEG C；Last 1h and be warming up to 135 DEG C, 2h is re-sintered at 135 DEG C；1h is lasted again to be warming up to
300 DEG C, 2h is sintered at 300 DEG C, polyimides/fluorinated graphene composite anti-wear coating is produced, as shown in e in Fig. 1.
Tribology tester experiment method and test condition
(1) dry friction is tested
Experimental facilities：UMT-2MT friction wear testing machines (USA, CETR)
Test condition：Dry friction
To the steel ball that rubs：Rank G10, diameter 6mm, technical basis GB308-2002
Load：20N
Frequency：3Hz
Time：30min
For the result of dry friction experiment as shown in Fig. 2 (a) is pure polyimide coating in figure, (b-e) is followed successively by fluorographite
Alkene content is that the polyamides of 0.25% (embodiment 1), 0.5% (embodiment 2), 0.75% (embodiment 3) and 1% (embodiment 4) is sub-
Amine composite coating.
(2) water lubrication frictional experiment
Experimental facilities：UMT-2MT friction wear testing machines (USA, CETR)
Test condition：Immersion lubrication, ultra-pure water
To grinding steel ball：Rank G10, diameter 6mm, technical basis GB308-2002
Load：20N
Frequency：3Hz
Time：30min
For the result of water lubrication frictional experiment as shown in figure 3, (a) is pure polyimide coating in figure, (b-e) is followed successively by fluorination
Graphene content is the poly- of 0.25% (embodiment 1), 0.5% (embodiment 2), 0.75% (embodiment 3) and 1% (embodiment 4)
Acid imide composite coating.
(3) oil lubrication frictional experiment
Experimental facilities：UMT-2MT friction wear testing machines (USA, CETR)
Test condition：Flooding system lubrication, saxol
To grinding steel ball：Rank G10, diameter 6mm, technical basis GB308-2002
Load：20N
Frequency：3Hz
Time：30min
For the result of oil lubrication frictional experiment as shown in figure 4, (a) is pure polyimide coating in figure, (b-e) is followed successively by fluorination
Graphene content is the poly- of 0.25% (embodiment 1), 0.5% (embodiment 2), 0.75% (embodiment 3) and 1% (embodiment 4)
Acid imide composite coating.
Tribology tester experimental result
It is compound that self-lubricating is made using two-dimension nano materials fluorinated graphene piece as filler using polyimides as matrix in the present invention
Abrasion-resistant coating material.Tribology tester of the coating under three kinds of common working conditions (dry friction, water lubrication and oil lubrication)
Show：Compared with pure polyimide coating, the polyimides composite anti-wear coating that fluorinated graphene addition is 0.5% shows
Optimal wear resistance is gone out.Detailed results are：Under DRY SLIDING, fluorinated graphene addition is 0.5% polyamides
The wear rate (0.87 × 10 of imines composite anti-wear coating-5mm3/ Nm) purer polyimides (1.39 × 10-5mm3/ Nm) drop
Low 37.4%；Under the conditions of water lubrication, fluorinated graphene addition is the abrasion of 0.5% polyimides composite anti-wear coating
Rate (1.51 × 10-4mm3/ Nm) purer polyimides (2.41 × 10-4mm3/ Nm) reduce 37.3%；In Oil Lubrication Condition
Under, fluorinated graphene addition is the wear rate (1.42 × 10 of 0.5% polyimides composite anti-wear coating-6mm3/ Nm) compared with
Pure polyimides (3.65 × 10-6mm3/ Nm) reduce 61.1%.
Claims (8)
1. a kind of polyimides with excellent abrasion resistance/fluorinated graphene composite anti-wear coating, including metallic substrates and painting
The composite anti-wear coating being overlying in metallic substrates, the metallic substrates are the iron-based material by machining, it is characterised in that：
The composite anti-wear coating constituent percentage composition by weight includes：
Polyimides 99% ~ 99.9%；
Kollag 0.1% ~ 1%；
The kollag is fluorinated graphene piece；
The preparation method of polyimides with the excellent abrasion resistance/fluorinated graphene composite anti-wear coating, including it is following
Step：
（ⅰ）The preparation of complex abrasion-proof coating
At low temperature, by a certain amount of monomer 4,4 '-diaminodiphenyl ether is added in aprotic polar solvent, treat monomer 4,4 '-
After diaminodiphenyl ether is completely dissolved, fluorinated graphene piece is added；Add and monomer 4,4 '-diaminodiphenyl ether equimolar amounts
Monomer pyromellitic dianhydride, stirring, produce complex abrasion-proof coating；
（ⅱ）The coating of composite anti-wear coating
By step（ⅰ）Gained complex abrasion-proof coating presses 0.1~0.2 mL/cm2Proportioning enter on the metallic substrate under room temperature environment
Row is brushed, coating surface uniform bubble-free；
（ⅲ）The sintering of composite anti-wear coating
First by step（ⅱ）Gained composite anti-wear coating is put into vacuum drying chamber, and 6h is dried at 60 DEG C~80 DEG C；Then
Place into baking oven, 2h is sintered at 80 DEG C；It is warming up to 135 DEG C and re-sinters 2h；300 DEG C of sintering 2h are warming up to again, produce polyamides
Imines/fluorinated graphene composite anti-wear coating.
2. a kind of polyimides with excellent abrasion resistance according to claim 1/fluorinated graphene complex abrasion-proof applies
Layer, it is characterised in that：The thickness of the fluorinated graphene piece is nanoscale.
3. a kind of polyimides with excellent abrasion resistance according to claim 1/fluorinated graphene complex abrasion-proof applies
Layer, it is characterised in that：The low temperature is -10 DEG C ~ 25 DEG C.
4. a kind of polyimides with excellent abrasion resistance according to claim 1/fluorinated graphene complex abrasion-proof applies
Layer, it is characterised in that：The aprotic polar solvent is DMA.
5. a kind of polyimides with excellent abrasion resistance according to claim 1/fluorinated graphene complex abrasion-proof applies
Layer, it is characterised in that：The step（ⅰ）The quality for adding fluorinated graphene piece is monomer 4,4 '-diaminodiphenyl ether and monomer
The 0.1% ~ 1% of pyromellitic dianhydride quality sum.
6. a kind of polyimides with excellent abrasion resistance according to claim 1/fluorinated graphene complex abrasion-proof applies
Layer, it is characterised in that：The step（ⅰ）Aprotic polar solvent and monomer 4,4 '-diaminodiphenyl ether and the equal benzene four of monomer
The mol ratio of formic anhydride is 32:1:1.
7. a kind of polyimides with excellent abrasion resistance according to claim 1/fluorinated graphene complex abrasion-proof applies
Layer, it is characterised in that：The step（ⅰ）Mixing time is 4~10h.
8. a kind of polyimides with excellent abrasion resistance according to claim 1/fluorinated graphene complex abrasion-proof applies
Layer, it is characterised in that：The step（ⅲ）135 DEG C being warming up to by 80 DEG C during middle sintering and lasting 1h, 300 DEG C are warming up to by 135 DEG C
Last 1~2h.
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| PL239477B1 (en) * | 2018-03-05 | 2021-12-06 | Politechnika Wroclawska | Method for producing permanent graphene coverings on metals |
| CN108484909B (en) * | 2018-03-29 | 2020-07-31 | 中国科学院福建物质结构研究所 | Fluorine oxidized graphene/polyimide composite material and preparation method and application thereof |
| CN113773745A (en) * | 2021-08-31 | 2021-12-10 | 上海源祁精密机械有限公司 | Wear-resistant coating for foil air dynamic pressure bearing and preparation method thereof |
| CN117070145A (en) * | 2023-10-12 | 2023-11-17 | 振东冶金科技江苏有限公司 | Wear-resistant corrosion-resistant stainless steel plate and preparation process thereof |
| CN117186765B (en) * | 2023-11-08 | 2024-01-30 | 成都石大力盾科技有限公司 | Solid self-lubricating coating and preparation method thereof |
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| CN103613927A (en) * | 2013-11-26 | 2014-03-05 | 哈尔滨工业大学 | Polyimide/fluorinated graphene composite film and preparation method thereof |
| CN103772981A (en) * | 2013-12-30 | 2014-05-07 | 四川大学 | Low-dielectric-constant polymer/fluorinated graphene composite material and preparation method thereof |
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